SN74AS646DWR

Product Overview

Category

SN74AS646DWR belongs to the category of integrated circuits (ICs).

Use

This product is commonly used in electronic devices for data bus transceiver applications.

Characteristics

• High-speed operation
• Wide voltage range
• Bidirectional data flow
• Non-inverting outputs
• 3-state outputs
• Schmitt-trigger inputs

Package

SN74AS646DWR is available in a small-outline, wide-body (SOIC) package.

Essence

The essence of SN74AS646DWR lies in its ability to facilitate the bidirectional transfer of data between two buses with different voltage levels.

Packaging/Quantity

SN74AS646DWR is typically packaged in reels and comes in quantities of 2500 units per reel.

Specifications

• Supply Voltage: 4.5V to 5.5V
• Input Voltage Range: -0.5V to VCC + 0.5V
• Output Voltage Range: -0.5V to VCC + 0.5V
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 6ns (max)
• Output Current: ±24mA

Detailed Pin Configuration

1. A1: Bus A Data Input/Output
2. A2: Bus A Data Input/Output
3. A3: Bus A Data Input/Output
4. A4: Bus A Data Input/Output
5. A5: Bus A Data Input/Output
6. A6: Bus A Data Input/Output
7. A7: Bus A Data Input/Output
8. GND: Ground
9. B1: Bus B Data Input/Output
10. B2: Bus B Data Input/Output
11. B3: Bus B Data Input/Output
12. B4: Bus B Data Input/Output
13. B5: Bus B Data Input/Output
14. B6: Bus B Data Input/Output
15. B7: Bus B Data Input/Output
16. OE: Output Enable
17. DIR: Direction Control
18. VCC: Supply Voltage

Functional Features

SN74AS646DWR offers the following functional features:

1. Bidirectional Data Transfer: Allows data to be transmitted bidirectionally between two buses.
2. Non-Inverting Outputs: Ensures that the output data matches the input data polarity.
3. 3-State Outputs: Provides a high-impedance state when disabled, allowing multiple devices to share the same bus.
4. Schmitt-Trigger Inputs: Enhances noise immunity and signal integrity.

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient data transfer.
• Wide voltage range allows compatibility with various systems.
• Bidirectional data flow simplifies circuit design.
• Non-inverting outputs ensure accurate data transmission.
• 3-state outputs facilitate bus sharing among multiple devices.
• Schmitt-trigger inputs enhance noise immunity.

Disadvantages

• Limited to specific applications requiring data bus transceiver functionality.
• May not be suitable for low-power or battery-operated devices due to power consumption.

Working Principles

SN74AS646DWR operates based on the principles of digital logic. It uses internal circuitry to control the bidirectional transfer of data between two buses. The direction of data flow is determined by the DIR pin, while the OE pin enables or disables the outputs. The inputs are processed using Schmitt-trigger logic, ensuring reliable data reception. The IC's internal architecture allows for efficient and accurate data transmission.

Detailed Application Field Plans

SN74AS646DWR finds applications in various fields, including:

1. Computer Systems: Facilitating data transfer between different components within a computer system.
2. Communication Equipment: Enabling data exchange between different communication modules.
3. Industrial Automation: Supporting bidirectional data flow in control systems and PLCs.
4. Automotive Electronics: Providing data bus transceiver functionality in automotive applications.
5. Consumer Electronics: Allowing data transfer between different devices within consumer electronics products.

Detailed and Complete Alternative Models

1. SN74AS646DW: Similar to SN74AS646DWR but available in a standard SOIC package.
2. SN74LS646N: A lower-power alternative with similar functionality but operating at a lower voltage range.
3. SN74HC646D: A CMOS-based alternative offering improved power efficiency and wider voltage compatibility.

These alternative models provide similar data bus transceiver functionality and can be considered based on specific application requirements.

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